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Sorry, I can't see the "red error" from here.
What is the symbol that is not found?
Please copy and post here the source line where that symbol is used that causes the error.

Please copy the full text of the error message and paste it here. It has important info about the error.

These are calls to the add listener methods:

this.addMouseListener(this); // Mouselistener
this.addMouseMotionListener(this); // Motionlistener

A listener will be added each time...

I was talking about calls to the addListener method. Each call will add another listener.
If you are not sure how many times the call to the add method is made, add a println() statement just...

Has the listener been added 3 times? It will get one call for each time it was added.